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Using “super” in C++
...d_t = MyBase;", but you still got duplicate code and still can't avoid the error from ctor delegation.
– Jay Yang
Aug 28 at 5:02
...
Create Directory if it doesn't exist with Ruby
...s. Assuming foo does not exist, you will receive no such file or directory error for:
Dir.mkdir 'foo/bar'
# => Errno::ENOENT: No such file or directory - 'foo/bar'
To create nested directories at once, FileUtils is needed:
require 'fileutils'
FileUtils.mkdir_p 'foo/bar'
# => ["foo/bar"]
...
Can “this” ever be null in Java?
...that operation.
Moreover, attempting this = null; will result in compiler error. Reason is pretty simple, a keyword in Java (or any language) can never be assigned a value i.e. a keyword can never be the left value of a assignment operation.
Other examples, you can't say:
true = new Boolean(true)...
程序员才能听得懂的笑话 - 轻松一刻 - 清泛网 - 专注C/C++及内核技术
...又怎样？” 程序员说，“我们从来不关心Warning，只关心Error”
21、一个年轻的程序员和一个产品经理登上了一列在山里行驶的火车，他们发现列车上几乎都坐满了，只有两个在一起的空位，这个空位的对面是一个老奶奶和一...
Mockito: Inject real objects into private @Autowired fields
...se is a terrible advise. It makes the test class brittle, not straight and error prone : What is really mocked ? What is really tested ?
@InjectMocks and @Spy also hurts the overall design since it encourages bloated classes and mixed responsibilities in the classes.
Please read the spy() javadoc be...
Changing the color of the axis, ticks and labels for a plot in matplotlib
...='x', colors='red') produces an AxesSubplot has no attribute 'tick_params' error. Do you know why?
– Richard Durr
Jan 21 '11 at 17:51
...
What are valid values for the id attribute in HTML?
...
The error that Augustus pointed out is still present. In your example, if you have id="firstName" in either HTML 4 or HTML 5 and #FirstName { color: red } in CSS, only a buggy browser will set the element's color to red.
...
Callback to a Fragment from a DialogFragment
...turn new AlertDialog.Builder(getActivity())
.setTitle(R.string.ERROR)
.setIcon(android.R.drawable.ic_dialog_alert)
.setPositiveButton(R.string.ok_button,
new DialogInterface.OnClickListener() {
public void onClick(Dialog...
Redirect From Action Filter Attribute
...eResult(
new RouteValueDictionary(new { controller = "Home", action = "Error" })
);
actionContext.Result.ExecuteResult(actionContext.Controller.ControllerContext);
It is not a pure redirect but gives a similar result without unnecessary overhead.
...
Insert new column into table in sqlite?
... In my tests, line INSERT INTO t1 SELECT a,c FROM t1_backup; causes the error: "table t1 has 3 columns but 2 values were supplied: INSERT INTO t1 SELECT a,c FROM t1_backup;". The correct line should be INSERT INTO t1 (a,c) SELECT a,c FROM t1_backup;
– JnLlnd
...